1989/10/01 by Paula Szkody, Steve B. Howell, Mario Mateo +1
Engineering · Physics and Astronomy · #Amplitude #Astronomical Observations and Instrumentation #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cataclysmic variable star #Gamma-ray bursts and supernovae #Light curve #Optics #Orbital period #Photometry (optics) #Physics #Stars #White dwarf
paper · pdf · doi:10.1086/132550
openalex publication_date 1989/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
We present time-resolved optical broad-band light curves obtained from differential photometry on sequential CCD frames of the known or suspected cataclysmic variables FO And, EH Aqr, WX Cet, XX Cet, AL Com, V503 Cyg, AH Eri, CP Eri, IR Gem, RW UMi, PG0134+070, and US 3215.The analysis of the light curves with coverage of > 2 hrs shows repeatable periodicity in five objects.PG0134+070 exhibits eclipses of 1.3-1.8mag depth with a period of 313 min.V503 Cyg has a 0.7-1.0mag peak-to-peak modulation with a period of 109 min.IR Gem shows a large modulation at the orbital period of 99 min, and comparison with previous data indicates that this modulation may have an amplitude dependent on outburst phase.AH Eri reveals a 0.1-0.3mag modulation, at a period of 42 min.Better time-resolved data on AL Com confirm the 0.4-mag variation reported by Howell and Szkody (1988) at a period of 42 min.These latter two short periods likely indicate magnetic systems.There is also some evidence of periodicity in RW UMi and WX Cet which must be confirmed with further data.